December weather forecastNissequogue, NY
December
Weather in December
December, the first month of the winter in Nissequogue, is still a chilly month, with an average temperature fluctuating between 36°F (2.2°C) and 43.3°F (6.3°C).Temperature
December's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a fresh 51.4°F (10.8°C) in November to a frosty 43.3°F (6.3°C). December is characterized by a steady nighttime low-temperature of 36°F (2.2°C).Humidity
In Nissequogue, the average relative humidity in December is 74%.Rainfall
In December, the rain falls for 12 days. Throughout December, 3.78" (96mm) of precipitation is accumulated. Throughout the year, there are 155.9 rainfall days, and 35.94" (913mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Nissequogue, in December, during 2.5 snowfall days, 1.42" (36mm) of snow is typically accumulated. In Nissequogue, New York, during the entire year, snow falls for 15.4 days and aggregates up to 5.71" (145mm) of snow.Ocean temperature
In Nissequogue, New York, in December, the average water temperature is 48.9°F (9.4°C).Note: Navigating the 48.9°F (9.4°C) at 55.4°F (13°C) is no joy, and temperatures less than 50°F (10°C) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 6:58 am and sunset at 4:25 pm. On the last day of December, in Nissequogue, sunrise is at 7:17 am and sunset at 4:34 pm EST.
Sunshine
In Nissequogue, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index are January through March and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Nissequogue, NY
- Average high temperature in December: 43.3°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in December: 36°F
The month with the highest average low temperature is August (71.6°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).
Average pressure in December
Nissequogue, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Nissequogue, NY
- Average wind speed in December: 12.4mph
The windiest month (with the highest average wind speed) is January (12.8mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in December
Nissequogue, NY
- Average humidity in December: 74%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall in December
Nissequogue, NY
- Average rainfall in December: 3.78"
The wettest month (with the highest rainfall) is July (3.94").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in December
Nissequogue, NY
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Nissequogue, NY
- Average snowfall in December: 1.42"
The month with the highest snowfall is March (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Nissequogue, NY
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in December
Nissequogue, NY
- Average sea temperature in December: 49°F
The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in December /
Average sunshine in December
Nissequogue, NY
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Nissequogue, NY
- Average sunshine days in December: 17 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in December
Nissequogue, NY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in December
Nissequogue, NY
- Average cloud cover in December: 48
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Nissequogue, NY
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
